Harbor Isle’s biggest natural hazard is inland flooding
Most of the natural-hazard damage FEMA expects in Harbor Isle comes from inland flooding, and overall the risk is moderate for a U.S. community.
What stands out about Harbor Isle’s weather risks
Read from FEMA’s records below. The page puts what stands out first.
What Harbor Isle faces
Each hazard’s share of the damage FEMA expects here, and how it compares with the rest of the country.
Inland flooding
Coastal flooding
Earthquakes
Hurricanes
How exposed is Harbor Isle?
FEMA expects yearly storm and flood damage to homes and buildings here to be higher than in 47% of U.S. communities, mostly from inland flooding and coastal flooding.
Rated higher than 893 of the 1,524 New York towns we cover.
Harbor Isle is smaller than a census tract, so it shares the figures of the tract around its center.
Does Harbor Isle flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Harbor Isle. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Harbor Isle isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Nassau County.Federal disasters declared here
None of the disasters declared for Nassau County shows FEMA aid or repair money reaching Harbor Isle itself in FEMA’s records.
Nassau County has had 24 natural disasters declared since 1953, most often hurricanes and severe storms.
Get ready for what Harbor Isle actually faces
A short kit for its top hazards, what to check before you buy, and where neighbors get alerts.
- Turn around at flooded roads: a foot of moving water can carry off a car.
- Flood insurance usually takes 30 days to start, so buy it before the forecast.
- Keep papers and medicines up high, in a grab-and-go bag.
- Know your evacuation zone and the way off the coast.
- Storm surge comes fast: leave when you’re told, not when the water arrives.
- Move cars to high ground before king tides and nor’easters.
- Drop, cover and hold on.
- Strap tall furniture and the water heater to the wall.
- Know how to shut off the gas.
- Look up the address on FEMA’s flood map.
- Ask the seller or landlord whether it has ever flooded, and what flood insurance costs there.
- Get a flood insurance quote early: policies usually start 30 days after you buy.
Know where neighbors sign up for alerts? Add it to the Handbook so everyone has it.
Harbor Isle and its neighbors
How storm and flood risk compares across the town line. Tap a town to see its hazards.
| Town | Rating | Mostly | Flood claims |
|---|---|---|---|
| Island Park | Very high | coastal flooding | 1,833 |
| Harbor Isle | Moderate | inland flooding | 0 |
Rating = expected yearly storm and flood damage as a share of what’s there, vs. U.S. communities. Flood claims = paid federal flood insurance claims on record.
Most disasters here begin in August–October
The month each of Nassau County’s 24 declared disasters began, since 1953.
What these numbers can and can’t tell you
- An average, not a forecast. FEMA’s National Risk Index estimates the damage 18 kinds of natural hazards cause in a typical year, from decades of records and models. A quiet decade can follow a bad year.
- Compared by rate. “Higher than N%” compares yearly damage as a share of what’s there, so a big city isn’t rated riskier just for having more buildings.
- Money that reached town. Flood claims are matched to Harbor Isle’s own flood-insurance community; household aid to the registrant’s city; repair grants to Harbor Isle.
- It follows property value. FEMA’s model weighs damage to buildings, so a place that recently lost many homes can rate lower than it feels.
Storm stories
Memories, warnings and help from neighbors in Harbor Isle.
Your answer becomes a post in Town Square.
Sources: FEMA National Risk Index (December 2025); OpenFEMA: NFIP redacted claims, multiple-loss properties, community status book and residential penetration rates, housing assistance (owners and renters), public assistance funded projects, hazard mitigation properties and disaster declarations. Census tracts: U.S. Census Bureau. Weather alerts: National Weather Service. Preparedness tips: Ready.gov. An average of past damage, not a forecast.